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Magnetic cyclodextrin-based chelated decolorization adsorption material and preparation method thereof

An adsorption material, cyclodextrin technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal compounds, etc., can solve the problems of difficult elution and regeneration, high manufacturing cost, small adsorption capacity, etc. Layer uniformity, reduce interference, achieve the effect of structure and function

Active Publication Date: 2019-08-13
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most adsorption materials mainly have the following problems: ① small adsorption capacity; ② high manufacturing cost; ③ difficult elution and regeneration, short service life; ④ difficult separation after adsorption, etc.

Method used

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  • Magnetic cyclodextrin-based chelated decolorization adsorption material and preparation method thereof
  • Magnetic cyclodextrin-based chelated decolorization adsorption material and preparation method thereof
  • Magnetic cyclodextrin-based chelated decolorization adsorption material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 5.54 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensing device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 15%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:30, and 1.08 g of sodium hydroxide with a mass fraction of 96% is added to a three-necked flask for dissolution ;

[0037] (2) In the solution of step (1), add 0.50 g of ferric oxide microspheres according to the mass ratio of β-cyclodextrin and ferric oxide microspheres to 1:0.5, and stir for 30 minutes with ultrasonic assistance;

[0038] (3) Add 22.18mL of liquid paraffin and 1.48g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:4, the mass volume ratio of the emulsifier to the oil phase is 1:15g / mL, and ultrasonic After auxiliary stirring for 30 min...

Embodiment 2

[0042] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 3.91 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensation device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 20%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:40, and 1.44g of mass fraction of 96% sodium hydroxide is added into a three-necked flask for dissolution ;

[0043] (2) In the solution of step (1), add 1.00 g of ferric oxide microspheres according to the mass ratio of β-cyclodextrin and ferric oxide microspheres as 1:1, and ultrasonically assisted stirring for 40 min;

[0044] (3) Add 23.45mL of liquid paraffin and 1.56g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:6, the mass volume ratio of the emulsifier to the oil phase is 1:15g / mL, and ultrasonic After auxiliary stirring for 30 minutes, the...

Embodiment 3

[0048] (1) Add 1.00 g of β-cyclodextrin with a mass fraction of 98% and 3.91 mL of deionized water into a 100 mL three-necked flask equipped with a constant pressure dropping funnel, a mechanical stirrer and a condensation device to form a β-cyclodextrin The mass percent concentration of dextrin is a solution of 20%, and the molar ratio of β-cyclodextrin and sodium hydroxide is 1:50, and 1.80 g of sodium hydroxide with a mass fraction of 96% is added to a three-necked flask for dissolution ;

[0049] (2) Add 1.50 g of ferric oxide microspheres into the solution in step (1) according to the mass ratio of β-cyclodextrin and ferric oxide microspheres to 1:1.5, and ultrasonically assisted stirring for 60 min;

[0050] (3) Add 31.26mL of liquid paraffin and 1.56g of Span-80 to the solution in step (2), the volume ratio of the water phase to the oil phase is 1:8, the mass volume ratio of the emulsifier to the oil phase is 1:20g / mL, and ultrasonic After auxiliary stirring for 30 min...

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Abstract

The invention discloses a magnetic cyclodextrin-based chelated decolorization adsorption material and a preparation method thereof. According to the material, cyclodextrin, epichlorohydrin and polyethylene polyamine are used as raw materials, dialdehyde is used as a crosslinking agent, core-shell type polymer microspheres which are coated with active polymer layers with abundant hydroxyl groups, amino groups and imino groups are synthesized online in the presence of ferroferric oxide microspheres through a reversed-phase microemulsion method, and then the core-shell type polymer microspheres react with carbon disulfide in the presence of an alkali to modify the surfaces of the polymer microspheres with dithioformyl-CSS-. The obtained adsorption material has an excellent capability of removing heavy metal ions and organic pollutants, a great decolorizing capability and good magnetic separation performance and overcomes the defects that traditional adsorbents are poor in heavy metal-organic matter composite pollutant disposal effect, low in efficiency and high in cost, disposal water is colored, it is difficult to separate materials after adsorption, and the operation is tedious. Heavy metal and organic pollutants in wastewater can be efficiently removed synchronously, and automatic control over a decolorizing and adsorption process and operation continuity are realized.

Description

technical field [0001] The invention relates to an adsorption material, in particular to a magnetic cyclodextrin-based chelating decolorization adsorption material and a preparation method thereof. Background technique [0002] Due to the high toxicity, carcinogenicity and non-degradability of heavy metal ions, and the high toxicity of organic substances such as dyes, both of them can accumulate in the human body through the food chain, causing dysfunction of the human body, resulting in various diseases. Therefore, these pollutants have caused serious harm to human health and the living environment. Especially with the rapid development of industry and agriculture, these water pollution has become increasingly serious, and it is urgent to take effective measures to deal with it. Therefore, it is urgent to develop a feasible method that can not only deal with heavy metal pollutants, but also effectively remove pollutants such as organic dyes, so as to deal with the increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/24B01J20/06B01J20/28009B01J20/28016C02F1/288C02F1/286C02F2101/308C02F2101/20
Inventor 刘立华杨正池赵露粟刚魏作校薛建荣唐安平
Owner HUNAN UNIV OF SCI & TECH
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